Permutation switch-lock.



E. C. TEACHOUT & E. L/HARRISON.

PERMUTATION SWITCH LOCK.

APPLICATION FILED OCT-22.1915.

Patented July 11, 1916.

fitte -Lung,

STATES PATENT OFFICE.

ELIlVIER c. TEACHOUT AND ELMEB L. HARRISON, or FLINi- MICHIGAR I ZPERMUTATION' SWITCH-LOCK.

Specification of Letters Patent.

Application filed October 22, 1915. Serial No. 57,263.

To all whom it may concern."

Be it known that we, ELMEI TEacHoU'r and ELMER .L. HARRISON, cit zens of the United States of America, residing at Flint the switch on an automobile.

The invention involves certain novelcombinations and arrangements in a permuta tion device in connection with the electric switch whereby the switch is held open and may not be closed except when the device is in correct and pro er position, as will be pointed out hereinafter.

In the accompanying drawings we have illustrated one complete example of the physical embodiment of our invention constructed according to the best mode we have so far devised for the practical application of the principles of the invention.

Figure 1 is a top plan view of the device. Fig. 2 is a vertical central sectional view on line 2-2, Fig. 1. Fi 3 is a transverse sectional view on line .-3, Fig. 2. Figs. 4 and 5 are details showing respectively the switch in unlocked position and in locked I position.

' In the preferred embodiment of our invention as illustrated in the drawing, the device is inclosed within a housing 1, which is formed with an integral top plate 2, and the open lower end of the housing is closed by an'insulating bottom member 3, secured in place by screws 3. The housing is located at a suitable and convenient position in the automobile, and is secured in place by means of the screws 4: which pass through the plate 2.

A plunger bar or cylindrical rod 5 is the operating member of the device, and this plungeris provided with a round head 6 located within the housing, and a handle 7 located on the upper end of the plunger and outside of the housing above the top plate 2. This plunger is reciprocable in the bottom in Permutation Switchinsulating member and" the top plate Patented July- 11, 1916.

through the respective openings 8 and which form bearings for the slidable or reciprocable plunger. This plunger is part f the electrical switch and the head 6 is adapt-' ed to co-act with the two resilientor spring side the housing. the interior face of the insulatingmemben 3 by the two screw posts 11, and jthe parts i I are'locked tOgether by the usual nuts ":and

the posts are provided with the'usual con-:

necting devices.

We employ two rotary members tions of the permutation device, indicated flat circular disks 14 and 15" respectively which are secured to the rotary members 'by the screws 16 and 17., The disks 14;

15 as seen in Fig. 2, are located just-below the top plate 2, and inside the-housing, and

each disk is provided with a cut-away per These outputs are tion as 14 and 15. upon curved lines concentric with the perimeter of the head 6 of the plunger, and in Figs. 4: and 5, it will be seen that the disks 1 1 and 15 are the locking members for the plunger 5 which forms the circuit closer of the switch. -.When the disks 14 and 15 are in the position indicated in Figs. 1, 2, and 3, the plunger is free to move, but when the disks are turned to position as in Fig. 5, the plunger is now locked in inoperative position. In Fig. 2, in dotted lines, the head 6 is indicated in locked position.

In connection with the plunger, we employ two scales, as shown on the plate 2 in Fig. 1, one scale for each knob. Thus, in the drawings, Fig. 1, the scale at the left is arranged with relation to the disk 14: so that when the arrow on the knob is pointing to 1, the plunger head 6 may pass through the curved edge 14: of the disk 14, and the scale at the right is arranged so that when the arrow on knob 13 is pointing to 8', the head 6 may pass through the cut out edge 15 of the disk 15. Thus, the combination in this particular lock is set for 1 and 8. It'will readily be seen that difierent combinations for each rotary member may be arranged by adjusting the disks 14: and 15 on their respective screws, and a consequent adjustment of the knob 12 and knob 13 with relation to their scales.

' A further guard is provided in the use of the locked screw 3 which extends through the casing 1 and is locked on the inside of the casing by nut 4}. This screw has a 5 V-shaped end 5 and projects inwardly beyond the periphery of the head 6 to prevent downward movement of the plunger when the head 6 is in dotted position (Fig. 2-)even though the disks 14 and '15 are in open position. A notch 6 is formed in the edge of head 6 which permits free movement of the plunger when the arrow on handle 7 is'poi'ntin to the upper numeral 1. In operation, w on it is desired to lock .the sparking circuit in open position, with the disks 1415 in the indicated position, the plunger 5 is pulled out of the switch arms 10 to the dotted position of the head 6, in Fig. 2. Then the knobs 12 and 13 may be turned to any point other than the respective points 4 and 8, and the head 6 is now held between the 'two disks 14 15 and the plate 2. In this position it will be seen that it is impossible to close the switch by pressing down on the handle 7, and the switch cannot be closed nor the engine start- *e'd until the disks 14 and 15 have been turned through the medium of their knobs.

12 and 13 to the position indicated in Fig.

i \4. The rotary members 12 and 13 have sufiicient frictional bearing in the plate 2 to prevent accidental displacement, and the plunger 5 fitsneatly in its bearings 8 and 9 in order to provide a stable movement, and it willof course be understood that the re silient arms 10 are adapted to be held spread apart by the head 6 on the plunger as it descends.

What we claim is The combination with an open bottom housing and an insulating member closing the same and resilient switch arms secured to the member within the housing, of a reciprocable plunger having a circular notched head engaging said arms and provided with a handle outside the housing, a locking device fixed in the housing and projecting in the path of movement of the notched head, a pair of rotary members each having a cut away disk in the housing to permit passage of the circular head and an actuating knob outside the housing, a scale for each knob on the housing, and an indi cating device on each knob whereby the looking disk scale and indicating device may cooperate for the purpose described.

In testimony whereof we ailix onr signatures in the presence of two witnesses.

ELMER C. TEACHOUT iELMER L. HARRISUN.

Witnesses:

JOHN F. BAKER, LoU S. SHArmo.

I I fiopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,-

Washi'ngton, D. O. 

